/*
 * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB.  All rights reserved.
 *
 * This file is part of the KD Chart library.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "KChartPalette.h"

#include "KChartMath_p.h"

#include <QBrush>
#include <QVector>

using namespace KChart;

namespace {

    static Palette makeDefaultPalette() {
        Palette p;

        p.addBrush( Qt::red );
        p.addBrush( Qt::green );
        p.addBrush( Qt::blue );
        p.addBrush( Qt::cyan );
        p.addBrush( Qt::magenta );
        p.addBrush( Qt::yellow );
        p.addBrush( Qt::darkRed );
        p.addBrush( Qt::darkGreen );
        p.addBrush( Qt::darkBlue );
        p.addBrush( Qt::darkCyan );
        p.addBrush( Qt::darkMagenta );
        p.addBrush( Qt::darkYellow );

        return p;
    }

    static Palette makeSubduedPalette() {
        Palette p;

        p.addBrush( QColor( 0xe0,0x7f,0x70 ) );
        p.addBrush( QColor( 0xe2,0xa5,0x6f ) );
        p.addBrush( QColor( 0xe0,0xc9,0x70 ) );
        p.addBrush( QColor( 0xd1,0xe0,0x70 ) );
        p.addBrush( QColor( 0xac,0xe0,0x70 ) );
        p.addBrush( QColor( 0x86,0xe0,0x70 ) );
        p.addBrush( QColor( 0x70,0xe0,0x7f ) );
        p.addBrush( QColor( 0x70,0xe0,0xa4 ) );
        p.addBrush( QColor( 0x70,0xe0,0xc9 ) );
        p.addBrush( QColor( 0x70,0xd1,0xe0 ) );
        p.addBrush( QColor( 0x70,0xac,0xe0 ) );
        p.addBrush( QColor( 0x70,0x86,0xe0 ) );
        p.addBrush( QColor( 0x7f,0x70,0xe0 ) );
        p.addBrush( QColor( 0xa4,0x70,0xe0 ) );
        p.addBrush( QColor( 0xc9,0x70,0xe0 ) );
        p.addBrush( QColor( 0xe0,0x70,0xd1 ) );
        p.addBrush( QColor( 0xe0,0x70,0xac ) );
        p.addBrush( QColor( 0xe0,0x70,0x86 ) );

        return p;
    }

    static Palette makeRainbowPalette() {
        Palette p;

        p.addBrush( QColor(255,  0,196) );
        p.addBrush( QColor(255,  0, 96) );
        p.addBrush( QColor(255, 128,64) );
        p.addBrush( Qt::yellow );
        p.addBrush( Qt::green );
        p.addBrush( Qt::cyan );
        p.addBrush( QColor( 96, 96,255) );
        p.addBrush( QColor(160,  0,255) );
        for ( int i = 8 ; i < 16 ; ++i ) {
            p.addBrush( p.getBrush( i - 8 ).color().lighter(), i );
        }
        return p;
    }

}

#define d d_func()

class Q_DECL_HIDDEN Palette::Private
{
public:
    explicit Private() {}
    ~Private() {}

    QVector<QBrush> brushes;
};

const Palette& Palette::defaultPalette()
{
    static const Palette palette = makeDefaultPalette();
    return palette;
}

const Palette& Palette::subduedPalette()
{
    static const Palette palette = makeSubduedPalette();
    return palette;
}

const Palette& Palette::rainbowPalette()
{
    static const Palette palette = makeRainbowPalette();
    return palette;
}

Palette::Palette( QObject *parent )
  : QObject( parent ), _d( new Private )
{

}

Palette::~Palette()
{
    delete _d; _d = nullptr;
}



Palette::Palette( const Palette& r )
    : QObject(), _d( new Private( *r.d ) )
{
}

Palette& Palette::operator=( const Palette& r )
{
    Palette copy( r );
    copy.swap( *this );

    // Q_EMIT changed() ?
    return *this;
}

bool Palette::isValid() const
{
  return d->brushes.size() >= 1;
}

int Palette::size() const
{
  return d->brushes.size();
}

void Palette::addBrush( const QBrush& brush, int position )
{
  if ( position < 0 || position >= size() ) {
    d->brushes.append( brush );
  } else {
    d->brushes.insert( position, brush );
  }
  Q_EMIT changed();
}

QBrush Palette::getBrush( int position ) const
{
  if ( !isValid() ) return QBrush();
  return d->brushes.at( position % size() );
}

void Palette::removeBrush( int position )
{
  if ( position < 0 || position >= size() ) return;
  d->brushes.remove( position );
  Q_EMIT changed();
}

